Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 596, Issue -, Pages 139-147Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.03.124
Keywords
N; P; S-costabilized Co; Cocatalyst; CdS; Photocatalysis; H-2 evolution
Categories
Funding
- National Natural Science Foundation of China [51772162, 52072197]
- Youth Innovation and Technology Foundation of Shandong Higher Education Institutions, China [2019KJC004]
- Outstanding Youth Foundation of Shandong Province, China, Taishan [ZR2019JQ14]
- Scholar Young Talent Program [tsqn201909114]
- Major Scientific and Technological Innovation Project [2019JZZY020405]
- Major Basic Research Program of Natural Science Foundation of Shandong Province [ZR2020ZD09]
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By modifying the coordination environment of metal-based cocatalysts, the photocatalytic H-2 evolution performance over semiconductors can be improved. The experimental results demonstrated that Co-NxPS/C showed high activity in enhancing H-2 evolution of CdS, indicating the potential to promote the development of other high-performance MOF-derived atomically dispersed cocatalysts.
Regulating the coordination environment of metal?Nx species by replacing N with low electronegativity atoms is an approach of tuning the electrocatalytic performance of metal-based sites. However, such effects on the enhancement of photocatalytic H-2 evolution over semiconductors are not discussed yet. Herein, we designed and prepared Co-based cocatalysts with controlled coordination environment via calcination Co/ZIF-8 loaded with triphenylphosphine followed by a sulfurization treatment. It was then used as cocatalyst to modify CdS. The effects of the coordination environment of Co atoms on the H-2 evo-lution activity of CdS were discussed. The obtained Co was co-stabilized by N, P, and S atoms and embed-ded in graphitic carbon (denoted as Co-NxPS/C). Experimental results indicated that the Co-NxPS/C exhibited high activity in enhancing H-2 evolution of CdS with a value of 1260 lmol after 5 h irradiation. The simultaneous replacement of N with P and S atoms in N-stabilized Co embedded in carbon could enhance light harvesting, accelerate the transfer of photogenerated electrons from CdS to carbon with increased electrons accumulation ability and conductivity, improve charge separation efficiency, and enhance proton reduction kinetics. It is believed that the results of this study could promote the devel-opment of other high performance MOF-derived atomically dispersed cocatalysts to increase photocat-alytic H-2 evolution. (C) 2021 Elsevier Inc. All rights reserved.
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